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Whistling bmw roof rack
I too recently purchased a series 3 and installed BMW roof racks. And these racks whistle unbearably at lower speeds. When I inquired about this with the BMW service department, they told me to expect extra noise with roof racks. I have owned cars with roof racks in the past and nothing comes close to the annoying whistle I am experiencing. I ended up taping up all the seams on the feet of the rack and successfully eliminated the high pitched squeal.
The problem seems to be in the design of the rack itself. There is a moving, locking panel on this model which lifts up to hide the bolts that attach the rack to the roof. The whistle is produced by the air moving through the seams of the plastic segments.
I'm still trying to resolve this problem with BMW. It seems incongruous to drive a gorgeous car with gaffer's tape wrapped around the roof rack.
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